9987671 has 2 divisors, whose sum is σ = 9987672. Its totient is φ = 9987670.

The previous prime is 9987643. The next prime is 9987709. The reversal of 9987671 is 1767899.

9987671 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9987671 - 2¹⁴ = 9971287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993835 + 4993836.

It is an arithmetic number, because the mean of its divisors is an integer number (4993836).

Almost surely, 2^9987671 is an apocalyptic number.

9987671 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987671 is an equidigital number, since it uses as much as digits as its factorization.

9987671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 47.

The square root of 9987671 is about 3160.3276728846. The cubic root of 9987671 is about 215.3548925069.

The spelling of 9987671 in words is "nine million, nine hundred eighty-seven thousand, six hundred seventy-one".